I do not understand very well that the keyboard detects the mouse, certainly w11 this version is not very compatible with this keyboard, it is a shame it is certainly one of the best keyboards, I use it every day to play my MMO for hours and without any problem for 10 years I do not want to get rid of it. 

Synapse is automatically installing drivers. As it’s an old keyboard, it’s uses Synapse 2.0 software - I assume you have Synapse 2.0 installed, and not newer 3 version?

It’s detected both as keyboard and mouse, because it can do also mouse macros (it’s not a bug).

thanks for your help that is the problem, I have synapse 2.0 the last version does not work well at all, every time I want to change in the interface any key, for example mute micro from key, or zoom in and out the image from keyboard I do not use mouse roulette, synapse does not respond and stays bug I must close it from the administrator, I have found a half solution, when I close the computer all my changes disappear but the software does not stay hung.

from driver I have used the option to revert to the previous driver, I have problems but less